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On current sheet approximations in models of eruptive flaresWe consider an approximation sometimes used for current sheets in flux-rope models of eruptive flares. This approximation is based on a linear expansion of the background field in the vicinity of the current sheet, and it is valid when the length of the current sheet is small compared to the scale length of the coronal magnetic field. However, we find that flux-rope models which use this approximation predict the occurrence of an eruption due to a loss of ideal-MHD equilibrium even when the corresponding exact solution shows that no such eruption occurs. Determination of whether a loss of equilibrium exists can only be obtained by including higher order terms in the expansion of the field or by using the exact solution.
Document ID
19950052013
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bungey, T. N.
(The University St. Andrews, United Kingdom)
Forbes, T. G.
(The University St. Andrews, United Kingdom)
Date Acquired
August 16, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Solar Physics
Volume: 149
Issue: 1
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
95A83612
Funding Number(s)
CONTRACT_GRANT: NAG5-1479
CONTRACT_GRANT: NAGW-3463
Distribution Limits
Public
Copyright
Other

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